Anatomy of the Eye

Question 1

What is the main blood supply to the orbit?

Answer 1

Opthalmic artery from the internal carotid

Question 2

What nerve is general sensory from the eye?

Answer 2

Trigeminal, opthalmic division

Question 3

Name the motor nerves to muscles of the eye?

Answer 3

Oculomotor, Abducens, Trochlear

Question 4

What are the weakest parts of the orbital cavity?

Answer 4

Medial wall and floor

Question 5

Name 2 symptoms of an orbital blow out fracture

Answer 5

Double vision, periorbital swelling, numbness over cheek and lower eyelid

Question 6

Name the 2 glands in the eyelid

Answer 6

Meibomian glands and sebaceous glands

Question 7

Define Blephartis

Answer 7

Inflammation of the eyelids

Question 8

What is the orbital septum?

Answer 8

Sheet of fibrous tissue originating from the orbital rim periosteum and blends with tarsal plates

Question 9

What makes up the lacrimal apparatus

Answer 9

lacrimal gland, lacrimal sac and ducts

Question 10

Define epiphora

Answer 10

Overflow of tears over lower eyelid

Question 11

Name the 3 layers of the eyeball

Answer 11

Outer = Sclera
Middle = Choroid, cilliary body and iris 
Inner = retina

Question 12

Name the 3 eye accommodations for near objects

Answer 12

Pupil constricts, eyes converge and lens becomes more biconvex (Fatter)

Question 13

Do rods or cones deal with high definition colour vision?

Answer 13

Cones

Question 14

Which cells pass the action potential to form the optic nerve?

Answer 14

Retinal ganglion cells

Question 15

Where is aqueous humour secreted from?

Answer 15

Ciliary body

Question 16

Define Glaucoma

Answer 16

Optic nerve damage secondary to raised intraocular pressure

Question 17

What is the most common type of glaucoma?

Answer 17

Chronic, open-angle glaucoma . Trabecular meshwork deteriorates with age, so the drainage is slowed

Question 18

Name 3 signs & symptoms of Acute closed-angle glaucoma

Answer 18

Painful red eye, 55 years +, irregular oval-shaped pupil, blurring of vision, halos around lights, nausea and vomiting.